I know most of you haven't heard of The Burger's Priest but it's a popular chain in Ontario. With burger names like New York's Finest Taxi Service, The High Priest, The Vatican City, Blue Steel, Double Magnum, Noah's Ark, The Tower of Babel, The Pope, Judgement Day, Armageddon and The Four Horsemen of the Apocalypse, it'd better be great. And it is. Fantastic flavour, creative designs and reasonable prices. If you're ever up this way, it is worth the effort to find one of their restaurants and try for yourself. I've linked their menu below. It's worth a look.
As for the American chains, I think Red Robin is excellent, and would be my go to if I had a choice.
Finally, I didn't see anyone mention Smashburger. I've had it twice in the US and thought it was great. Is that not a widely held opinion, or are there just not enough of them to get recognized?
Link: The Burger's Priest